參數(shù)資料
型號: μPD78052
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述: 8位單片機微控制器(8位單片微控制器)
文件頁數(shù): 40/78頁
文件大小: 597K
代理商: ΜPD78052
40
μ
PD78052, 78053, 78054, 78055, 78056, 78058
Subsystem Clock Oscillation Circuit Characteristics (T
A
= –40 to +85
°
C, V
DD
= 2.0 to 6.0 V)
MIN.
32
32
5
Notes 1.
Indicates only oscillation circuit characteristics. Refer to
AC Characteristics
for instruction execution
time.
2.
Time required to stabilize oscillation after V
DD
reaches MIN in the oscillator voltage range.
Resonator
Crystal
resonator
External
clock
Parameter
Oscillator
frequency (f
XT
)
Note 1
Oscillation
stabilization time
Note 2
XT1 input
frequency (f
XT
)
Note 1
XT1 input
high/low level width
(t
XTH
, t
XTL
)
Test Conditions
V
DD
= 4.5 to 6.0 V
TYP.
32.768
1.2
MAX.
35
2
10
100
15
Unit
kHz
s
kHz
μ
s
Cautions 1. When using the subsystem clock oscillator, wiring in the area enclosed with the broken line
should be carried out as follows to avoid an adverse effect from wiring capacitance.
Wiring should be as short as possible.
Wiring should not cross other signal lines.
Wiring should not be placed close to a varying high current.
The potential of the oscillator capacitor ground should be the same as V
SS
.
Do not ground wiring to a ground pattern in which a high current flows.
Do not fetch a signal from the oscillator.
2. The subsystem clock oscillation circuit is a circuit with a low amplification level,more prone
to misoperation due to noise than the main system clock.
Recommended Circuit
XT1
XT2
C4
C3
R2
V
SS
XT1
XT2
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